Brewers are supposed to have really good filtration FWIW. [1] If particles are showing up in beer then something has gone horribly wrong as in, someone is being incredibly cheap. [2]

[1] - https://www.beer-brewing.com/beer_brewing/beer_brewing_water...

[2] - https://www.ewg.org/research/getting-forever-chemicals-out-d...

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justin66 12 hours ago | parent | next [-]

Which of the filtration methods on that list do you believe should be capable of filtering PFAS, the "forever chemicals" in question?

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Bender 12 hours ago | parent [-]

I linked them.

	▲	dnemmers 9 hours ago \| parent [-]
		I read through both of the links posted. I couldn’t find mention of PFAS or ‘forever chemicals’ anywhere on the first link(it may just be a little out of date concerning the last few years of development. The second link didn’t show any mention of a beer brewing link, but was specifically addressing ‘forever chemicals’ that are meaningfully on topic. Unfortunately they also included this caveat: “Although some of the filters did not achieve 100 percent reduction in PFAS measured in the water samples, they did eliminate 100 percent of PFOA and PFOS, two of the most notorious forever chemicals.”

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cluckindan 11 hours ago | parent | prev | next [-]

PFAS may be ending up in the product from the processing equipment, not necessarily only from the water source.

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12 hours ago | parent | prev | next [-]

[deleted]

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robthebrew 12 hours ago | parent | prev [-]

in a microbrewery? You are kidding.

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Bender 12 hours ago | parent [-]

in a microbrewery? You are kidding.

I am not. The level of filtration required to remove chemicals is simple. It's a cost, but that cost can be moved to the customers and the beer can be promoted as "The Only Safe MicroBrew In {insert_state}". Artesian waters are a massive money maker. Apply the same sales logic to the beer. If anything I would taunt all the other micro-brewers and laugh all the way to the bank.

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justin66 9 hours ago | parent | next [-]

I gather even artesian wells can contain these chemicals, which get pretty much everywhere.

On the other hand, based on the article you linked to, if something like a Berkey filter is sufficient (I have doubts about their testing, but whatever) the cost is probably not prohibitive. Assuming there's something as effective as a Berkey which can handle a more practical flow of water, but at the same cost per volume of water handled.

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ch4s3 11 hours ago | parent | prev | next [-]

Some places with weird water profiles will set up RO systems and add minerals to build a water profile on top of that, but it's far from the norm. People decide based on how their municipal water supply works with the kind of beers they want to make. I've seen a few brewhouses in the process of being built and talked to some commercial brewers about water, and depending on the location some places just use municipal water. New York water has a great profile for beer.

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timr 11 hours ago | parent [-]

You don't need reverse osmosis to filter out PFAS -- activated carbon will do it.

	▲	d4v3 11 hours ago \| parent \| next [-]
		Activated carbon will remove the larger chain PFAs, but is not as effective as removing the smaller ones. From the paper: > Conventional water treatment employed at municipal drinking water treatment plants have been shown to be nearly ineffective at removing PFAS. This can leave the burden and cost of implementing more sophisticated water treatments to brewers unless public water suppliers implement tertiary treatment to remove PFAS from finished water prior to distribution. Anion exchange and activated carbon treatments have been shown to more effectively remove longer-chain PFAS and PFSAs but were less effective in removing PFCAS and the alternative shorter-chain PFAS and PFECAs. Reverse osmosis treatment showed significant removal of PFAS of different chain lengths in drinking water, but can be prohibitive due to high operational costs and energy usage. In areas with known contamination, beers from macro- breweries were less likely to have detectable PFAS than craft beers brewed at a smaller scale, potentially due to more effective and expensive filtration of tap water at larger breweries.
	▲	ch4s3 10 hours ago \| parent \| prev [-]
		This isn't correct in the general case. In the specific case of brewing, if you're filtering at all it makes sense to use an RO system so that you can then do mineral adjustments from the RO base water.I'm not aware of any brewers outside of homebrewing using charcoal filtration.

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lubujackson 10 hours ago | parent | prev [-]

There is a reason literally no beer maker does this. Hard to promote beer on health factors when it is already a literal poison...